Electric gong.



No. 824,397. PATENTED JUNE 26, 1906.

W. P. WORD.

ELECTRIC GONG. APPLIOATION FILED MAB. s, 1905.

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ELECTRIC GONG.

Specification of Letters Patent.

Patented June 26, 1906.

Application filed'March 8,1905- Serial No. 249,028.

To all whom it may concern:

Be it known that 1, WILLIAM F. Wonn, a

citizen of the United States, residing at Helena, in the county of Lewis and Clark and State of Montana, haveinvented new and useful Improvements in Electric Gongs, of which the following is a specification.

Thisinvention relates to single-stroke signal-gongs of that character designed to be operate by the single phase of an alternating current of electricity.

One of the objects of the invention is to provide a reliable signal-gong for use in mine-hoists for giving signals to smelters or for use at any place where a direct current is not available or where a battery is not convenient or is expensive.

Another object is to provide a device of this character which shall be simple and durable in construction, reliable and efficient in operation, and which may be produced and operated at small cost.

These and other objects are attained by means ofthe construction illustrated in the accompanying drawings, in which- Figure 1 is a diagrammatic and partial sectional view of a device embodying my invention, and Fig. 2 represents a detail view of adjusting means for the lever.

Referring to the drawings for a more particular description of the invention, the numeral 1 designates a gong which may be of any suitable size and may be supported in any convenient place within hearing of the engineer or other person to whom signals are to be given. A hammer-head 2 is formed on or secured to a spring-arm 3, and the opposite end of the spring-arm is secured to a lever 4. This lever 4 may be of wood or iron and is pivoted at 5 to any suitable support. At the end of this lever a suitable counterweight 6 is attached. A spiral spring 7 is connected to the under side of the lever 4, and the opposite end ofthe spring 7 is connected to a screw 8, which passes through a screw-eye 9, secured to the support, and a nut 10 is 'fitted tothe screw 8 for giving the re uired tension to the spring 7 to properly poise or counterbalance the lever 4. A spool 11, wound with insulated wire 12, has a central longitudinal openin 13. A soft-iron core 14 is flexibly suspen ed from the lever 4 and hangs within the opening 13. A rod 15, of non-magnetic material, is secured to the lower end of the core 14, and at its lower end said rod is provided with a nut or stop washer 16, which is preferably made of nonmagnetic material and serves to prevent the outward movement of the core 14 beyond the required point. The' terminal ends 17 and 18 of the wire 12 are led from the spool 11 to a push-button 18, located at any suitable point where the signals are to be given.

Stops 19 and 20.are secured to the support for the gong 1 at suitable points to limit the vibrating action' of the spring-arms 3. A suitable connection 21 is provided for attachment to an electric-light fixture.

The operation of the device may be described as follows: When the connection 21 is connected to an electric-light fixture, the apparatus is in conditionfor use. The pushbutton 18 being depressed, the coil '12 is magnetized and the solenoid 14 is drawn inward into the magnetized spool and the lever 4 is actuated, the hammer-head 2 striking the gong 1 with considerable force. The springarm 3 in its upward movement strikes the stop 19, located in the path of said spring arm 3, thus causing the spring to bend in, permitting the hammer to contact with the gon 1 and furnish the desired signal. The sai spring then recoils and moves out of the field of vibration of the gong 1. A sto cated below the spring-arm 3, a jacent to the hammer 2, said stop serving to deaden the vibratory action of said spring-arm.

Should the pressure on the button 18 be continued, the alterations of the current would not cause the gong to be struck a ain, owing to the fact that the stop 19 will ho d the hammer-head 2 away from the gong and the solenoid will be held de ressed in the magnet ized spool 11. This e ect would be the same whether a direct or an alternating current were usedin connection with the device. However, the device is particularly designed for use with an alternating system, and owin to the fact that the lever 4 may be adjuste to an accurate condition of counterpoise relative to the stops 19, 20, and 16 the gong will strike but once for each depression 0 the push-button 18. Thus signals of different meaning and import may be indicated by depressin the button one or more times.

It 1 be obvious that the device may be adjusted to any desired position.

Various changes in form and proportions'may be resorted to without departing.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a sin le-stroke gong, a counterbalanced pivote arm carrying a spring-hammer, a spring supporting said hammer, and

secured to said pivoted arm, a stop adapted to contact with the spring in its upward movement causing the spring to continue its upward movement and furnish the desired signal, a stop belowthe spring and adjacent to the hammer to deaden the vibratory ac tion of said spring, and a solenoid to actuate the hammer, substantially as described.

2. A device of the character described, comprising a gong, a pivoted hammer, a spring portion supporting said hammer, a stop ocated in the path of said spring portion, and at a distance from the gon so as to require the spring to bend in striiing the gong, a stop below the spring adapted to contact therewith and adjacent to the hammer, said stop serving to deaden the vibratory action of said spring.

3. In a device of the character described, a counterbalanced pivoted arm, a gon a hammer-head carried by a thin spring-pi ate, said plate being secured to the pivoted arm, stops at the o posite sides of the said spring-plate, means or laterally adjusting the pivoted I season arm, a flexibly-suspended core for actuating the hammer, and means substantially as described for limiting the movement of the core with respect to the hollow electromagnet.

4. In a device of the character described, a gong, a counterbalanced pivoted arm, a spring secured to one end of said arm stops located in the path of the spring, a hammer on said spring, a hollow electromagnet, a soft-metal core flexibly suspended from the pivoted arm and extending into the hollow magnet, a non-magnetic rod extending from the soft-metal core into said magnet and provided with a non-magnetic washer at its lower end, and means for energizing the ma net and actuating the hammer, substantially as described.

5. In an electric gong, a pivoted arm, means for laterally adjusting said pivoted arm a gong, a spring secured to the end of said arm, a hammer secured to said spring, a stop in the path of movement of said spring to throw the hammer away from said gong after contact therewith, and servin to insure contact with the gong when sai spring strikes said stop.

WILLIAM F. "WORD.

Witnesses:

R. LEE -Wonn, CHAs. F. WORD. 

